Can't get past lesson 4 on Mac

Can't get past lesson 4 on Mac

I went into text edit, changed preferences to text, and started my lesson. I really don't understand about opening a second browser page, tried it but don't know what to search for.I did the lesson, but when i got to the part about opening my page on the browser, it looked exactly as I had typed it, not like a web page. I opened source, and a lot of other stuff was there. I copied it so you'd know what it is.

I tried getting started on windows 98 many years ago, and didn't have these problems, but Windows would freeze up. I love my Mac, it doesn't freeze up, but somehow I don't seem able to make the jump from your instructions for Windows, though I followed what you said to do for Mac.I feel like going to sleep forever away from computers, but I don't believe in suicide, so I'm just frustrated as can be.I got this Mac over two years ago hoping for quantum increase in abilities, but all I can still do is e-mail surf, edit music and pages. I keep hearing how simple HTML is, but I just can't seem to get started, even with your tutorials.